All right, I tracked down a bug in the current version of GearScore (1.0.00+). This issue is when new items are released by blizzard. The first time you look at the item the information gets passed to BonusScanner to scan the item. However if its not in your local Cache (IE your Client hasn't seen it "before" then BonusScanner will bug out in attempting to view that item). This will only occur each time once per time you've seen the item. Sometimes you may see the item without mousing over it (Such as while some character is wearing them that you see) and this wont cause a bug. I'll look for a way to attempt to determine of an item is in Cache before passing it to BonusScanner.